[(1 1/5−2/5)⋅(−3/4)3]÷(−9)

Solve 2x+y=3 x+y=5 in substitution method

Afarmer sells 9.5 kilograms of apples and pears at the farmer's market. 4/5 of the weight is the apples and the rest is the pears. how many kilograms of pears did she sell at the farmers market

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).